[Suicide Junkie]

An interesting experiment had people reacting to things while in a real time scanner (CAT or MRI or something).

When for example, they touched something hot, they would, naturally, jerk their hand back.
A noticable amount of time later, the brain activity would kick up in response.

The people would report that they actively moved their hand, when it was a subconsious reflex, and the brain simply hadn't had a chance to notice and respond by that time. They just didn't remember it that way.